The oxidation of particulate-reinforced Si3N4-TiN composites
The effect of TiN grain size and content on the mechanism and kinetics of high-temperature (up to 1500°C) oxidation of hot pressed silicon nitride (HPSN) was studied in air under isothermal and non-isothermal conditions. Analysis of oxidation products revealed the formation of rutile in the temperat...
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| Veröffentlicht in: | Corrosion science 1992-04, Vol.33 (4), p.627-640 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The effect of TiN grain size and content on the mechanism and kinetics of high-temperature (up to 1500°C) oxidation of hot pressed silicon nitride (HPSN) was studied in air under isothermal and non-isothermal conditions. Analysis of oxidation products revealed the formation of rutile in the temperature range from 600 to 1000°C and also α-cristobalite, β-Y2Si2O7, yttrialite, mullite and Y2Ti2O7 at higher temperatures. The oxidation of Si3N4-TiN composites shows different behaviour depending on the temperature. The presence of fine isolated inclusions of TiN (30 mass %) a noticeable increase of the oxidation rate was observed. |
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| ISSN: | 0010-938X 1879-0496 |
| DOI: | 10.1016/0010-938X(92)90210-T |